Green-blue sulfur dye and process of making same.



UNITY-f PATENT OFFICE.

*lVa-iXrLl lYlXS'IIEIN AND ERNESTEUGENENAEF,()F MANCHESTER; w ENGLAND."

G E N-BL E "SULFUR DYE .ANb jRodE'sjs QF.MAKVI'NGQQAIME'L.

No. '802,049. Specification of Letters sia; f

To u iwnil it'wuiy. '00,n 'ce1 "n.-- I

' Be it'known that wefIVAu LEvrNsTuINQa; sub ect ,ot' the King-of Great Britain and Ire-- land; and ERNEST EUGENE 'Nauna citizenof' para-nitroso-orthocresol oranyofl the t'wo said compounds which contain a chlorin aton 'z 1X1,'-l3l16 ortho position to the hydroriyl' group 'condense under suitable conditions with amidor."

sulfo acids of the benzinfand naphthalene se- .r'ies, which hare-the para positiont'o the-amide 'group unoccupied for-nlingblue-colored com:

pound-s. -These substancesor'their reduction product's yield, when heated with sodium p'olysulfids. most valuable new lyestu'lis'whi'ch dye unmordanted cotton greenish-blue shades fast to acid and light.

, The'fo'llowing examples winserve to illus trate the nature of this invention.

f We dissolve forty-five parts ,olClev'es'acid (either the techhical'inixture of hl'llStlQidOi. any of the pure isomers) in one hundred and forty parts ofsulfnric acid'(seve nty percent.)

at 3Q centigrade. ln cooling down part of" the Glev'es'acidseparates out in a very'fine. state of division. To the mixture; at a tem-" perature of from. 10 to 20 centigrade, "are gradually added twenty-live parts of parai 'trosophenfol. After the condensation is tinished the result is poured into a concentrated aqueous solution of one hundred'and twenty fii e p'arts'of soda carbonate, whena-darl'; resi'nous matter is precipitated. This .niatter is 'filteredoff and may directly be used for transformation into'asulfur color; but itis, preferable to reduce the condensation product with a Very dilute-solution of sodium sulfid; by. which an easily-solubleleuco compound is formed, which can be precipitated by addition oi a mineral acid or bicarbonate of soda and salt. .The red uction' can also-be made by any other suitable red u'eihg agent. The leuco coni- 'poundforrns a graypowder soluble in caustic alkali, which solution oxidizes rapidl in con-- tact with air.

For the subsequent transformation of the direct condensation products or the corre- Istuifs we proceed, for instancafas follows;

' foregoing eiia in ple or the "cot res'pondin'gidev Patented o a'l'iglieoa; Anpliciatioufiied Jazregry.6. 1904."Serial-N0.187,883.:(Sphniinipidlk.

Teni partsgof' the leuc'o baseobtained, as in the r'i i:ative ob'tained with nitroso ortho cresol are added to a hot solution'of.fortyparts'of cr y'sf', 'tallizedsodium'sulfidand ten par t sof sulfur and heated for: about: froih [twenty-"four to gthirty s xhou'rs at from 1 110 to 120 -cen't'i- Igradewith or without a reflux condenser.

Out-of." the darkecolored melt," which contains themew color-da s a leuco compound, the-new, dye can be separated-bythe addition of a nun-" e'ral acid orbyoxidizing it with a current of 'ai ri iii in the described example the tem'per-' a'ture of the-sulfur melt is liepta't. about centig'ra'd-e or below,' bl,ue-r shadesare obtained.

The new-color dyes direct, vegetable fiber a 1 nice greenish-blue. I 4 I lnsteadohthe product of "condensation ob-.

tained' vithCleves acid, other amidosul'fo;

acids of, the benZ-in. and nap ithalene class which hat eapare p'psition'to the ami'do group unoccupied maybe used,

The z'olori n g-m atters :p rod'uo'ed acco rd i n gto 'th-is'inu'ention are insoluble in cold and hot water, soluble in concentrated sulfuric-acid twlitha greenish-blue'col-or, insolublefin caustic alkali and sodacarbonate,-alcoliol, anili-n, aiid ben'zln. 4 I I With a grayish-blue colon] formmga- .leueo heiv aresoluble' in sodium snllid ish-blue tint.

' \Vhat we desire to clairn as our. invention is sulfur d'yestulfs, which consists in cond e'nsi ng' paramitrosophenol with Cleves acids reducing the result thus obtained, and heating the product with alkali polys'ulfids; substantially as and in 'theimannei" described. v

3. The greenish-bl.ue"sulfur dyestulis-Which are insoluble in cold' .and hot water. soluble in concentrated'sulfuricacid with a greenisl'i-blue color, insolublein caustic alkaliand soda carbonate, alcohol,- anilinand be'nzin, .solublein sodium sulfid with 'agrayiSh-blue color forming a leuco compound and dyeingvegetablespondingl'euco compounds into sul-furi zed dyetibers agreenish-blue tintian'd which dyestuffs are insoluble in cold and hot water, soluble in forming aleuco compound and dyeing vegeta- 'ble fibers agreeuish-blue tint, and which dyesul'fids, substantially as herein described.

are produced by condensing para-nitrosophenol jwith Cleves acids and reducing the result thus obtained to a colorless leuco compound and heating the leuco base with alkali poly- 4. The greenish-blue sulfur dyestuffs which concentrated sulfuric acidwith a greenishblue color, insolublein causticalkali and soda carbonate, alcohol. anilin and benzin; soluble in sodium sulfid with a grayish-blue color names to this specification in the presence of two subscribing witnesses.

/ IVAN LEVINSTEIN. ERNEST EUGENE NAEF.

Witnesses: I

WILLIAM Geo. HEYs, FRAM A.- HEYS. 

